- Peaslee, E. R. (Edmund Randolph), 1814-18789
- Pellegrini, Carlo, 1838-1889, artist9
- Peters, John C. (John Charles), 1819-1893, author9
- Philadelphia Medical Society.9
- Piffard, Henry G. (Henry Granger), 1842-1910, author9
- Pirogov, Nikolaĭ Ivanovich, 1810-1881, author9
- Pooley, J. H. (James Henry), 1839-1897, author9
- Priestley, Joseph, 1733-18049
- Providence (R.I.). Board of Health, author.9
- Reese, John J. (John James), 1818-18929
- Richardson, Joseph Gibbons, 1836-1886, author9
- Ricketts, B. Merrill (Benjamin Merrill), 1858-1926 author9
- Robbins, Henry Alfred, 1839-1911 author9
- Roe, John O., author9
- Russell, Andrew J., photographer9
- Sachs, Bernard, 1858-1944, author9
- Samson, Lok Wong, author9
- Sands, Henry B. (Henry Berton), 1830-1888, author9
- Shands, A. R. (Aurelius Rives), 1860-1941, author9
- Sherwood, H. H. (Henry Hall)9